median lethal dose

noun

the quantity of a lethal substance, as a poison or pathogen, or of ionizing radiation that will kill 50 percent of the organisms subjected to it in a specified time period. Symbol: LD50

Origin of median lethal dose

First recorded in 1945–50

Words nearby median lethal dose

medial supraclavicular nerve, median, median artery, median bar of mercier, median groove of tongue, median lethal dose, median line, median longitudinal raphe of tongue, median nerve, median plane, median point

British Dictionary definitions for median lethal dose

median lethal dose

mean lethal dose

noun

the amount of a drug or other substance that, when administered to a group of experimental animals, will kill 50 per cent of the group in a specified time
the amount of ionizing radiation that will kill 50 per cent of a population in a specified time
Abbreviation: LD 50